TBFMX — US Treasury 3 Month Bill ETF
Data updated: 2026-07-28
TBFMX — US Treasury 3 Month Bill ETF data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Ultra-Short Treasury / Sovereign Bond · $7.10B AUM · 0.15% expense ratio. From SEC regulatory filings.
TBFMX Fund Overview
TBFMX — US Treasury 3 Month Bill ETF is a US mutual fund managed by Rbb Fund, Inc., categorised as Ultra-Short Treasury / Sovereign Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Rbb Fund, Inc.
- Category: Ultra-Short Treasury / Sovereign Bond
- Assets under management: $7.10B
- Ticker: TBFMX
- SEC CIK: 0000831114
- SEC series ID: S000077176
- Share class ID: C000271378
TBFMX Holdings
Top 2 holdings of US Treasury 3 Month Bill ETF by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Treasury Bill | 100.01% |
| U.S. Bank Money Market Deposit Account | 0.00% |
TBFMX Portfolio Allocation
Asset-class allocation of US Treasury 3 Month Bill ETF by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 100.0% |
TBFMX Performance
Total returns for TBFMX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 0.2% |
TBFMX Costs and Fees
TBFMX costs about $15 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.15%
- Gross expense ratio: 0.15%
- Portfolio turnover: 0%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
TBFMX Cashflows
Over the 12 months to 2026-02, US Treasury 3 Month Bill ETF had net inflows of $1.41B, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-02 | $110.86M |
| 2026-01 | −$18.02M |
| 2025-12 | −$26.58M |
| 2025-11 | $151.79M |
| 2025-10 | $196.71M |
| 2025-09 | $18.87M |
TBFMX Debt Constituents
Largest debt holdings of US Treasury 3 Month Bill ETF by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Treasury Bill | 100.01% |
TBFMX Prospectus and SEC Filings
Official US Treasury 3 Month Bill ETF filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Ultra-Short Treasury / Sovereign Bond funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.